摘要
朝向和反向眼跳任务是两种较为常用的眼跳任务范式。本研究使用EyeLinkⅡ型眼动仪,采用完全被试内设计,操纵了眼跳任务类型、目标方向和目标偏心距水平,考察了大学生在朝向和反向眼跳任务中的方位效应,即目标刺激相对于屏幕中心的方向和偏心距对于眼跳各指标的系统性的影响。研究结果发现:(1)反向眼跳任务难度高于朝向眼跳任务,主要体现在反向眼跳任务中的首次方向错误眼跳错误率较高,眼跳潜伏期较长。(2)反向眼跳任务中,目标的方向效应主要体现为目标在右侧时,错误率较高,做出错误眼跳较快,而做出修正眼跳则较慢。朝向眼跳任务中,没有出现方向效应。(3)在朝向和反向眼跳任务中,都出现了目标的偏心距效应,即随着目标偏心距的增大,眼跳潜伏期缩短,眼跳落点视角增大,眼跳速率峰值也增大。
Pro- and antisaccade tasks are two kinds of popular saccade paradigms. In current research, EyeLinkⅡeye tracker was used to explore the direction-eccentricity effect in pro- and antisaccade tasks of younger participants, that is the systematical influences on saccade performance of the direction and eccentricity of target stimulus. The design was within-subject design, with saccade task, target direction and target eccentricity all as variables. Following conclusions are found: (1) antisaccade task is more difficult than prosaccade task, mainly because of a higher direction error rate and a longer saccade latency of the first saccade in antisaccade task; (2) there were direction effects in antisaccade task but not in prosaccade task, mainly embody a higher direction error rate and a shorter latency of the first directional error saccade, and a longer correction latency, when target were presented at the right side of the fixation area; (3) there were eccentricity effects in both prosaccade and antisaccade tasks, that is, saccade latency, amplitude and peak velocity all increased with the increasing of target eccentricity.
引文
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